poetee



(No Model.)

B. N. PORTER. v CORNER 0R PLATE ATTACHMENT FOR EXTENMON WINDOW SCREENS.

Mar. 9, 1886.

I Patentg N. PETERS. Phalu-lilhugrapher. Wmhinglou, D, C

lthvrrnn STATES PATENT tries.

EDWARD N. PORTER, OF BURLINGTON, VERMONT.

CORNER 0R PLATE ATTACHMENT FOR EXTENSION WINDOW-SCREENS.

SPECIFICATIQN forming part of Letters Patent No. 337,433, dated March 9, 1886.

Application filed May 12, 1885.

T 0 all whom it may concern.-

Be it known that I, EDWARD N. PORTER, a citizen of the United States, residing at Burlington, in the county of Ghittenden and State of Vermont, have invented certain new and useful Improvements in Corner or Plate Attachments for Extension Window-Screens, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to an improvement in window-screens; and it consists in, first, the combination ofthe two frames of an extensible screen with a corner-plate secured to one side of one of the frames at its corner, and which is provided with an angular projection which extends over a portion of the other frame and catches in a groove therein; second, a metallic corner brace or plate which is fastened to the inner face of one of the horizontal or sliding bars of one of the screen-frames, on which is a shoulder upon which is formed a projection, the free end of which projection enters and freely moves in a groove in the interior face corresponding to the bar of the other screen-frame, as will be more fully described hereinafter.

Theimproved construction is simple, cheap, strong, and easy and reliable in operation.

In the drawings, in which similar letters indicate like parts, Figure l is a plan view of the device in combination with a metallic corner-brace. Fig. 2 is an end view of the same. Fig. 3 is a perspective view of the extension-screen without the netting. Fig. 4 is a cross-section with the projection shown on the opposite face of the plate in dotted lines. Fig. 5 is a plan view of the projection attached to a plate designed for the lower bar of the frame. Fig. 6 is a similar view of the plate, taken from its opposite side.

its open or free end (I being designed to move,

or slide in the groove or recess 0, cut in the interior faces of the horizontal or sliding bars ofv the screen-frames.

Serial No. 165,934.

(No model.)

For the purpose of strength and cheapness I prefer to have the projection cast upon the outer face of a corner-bracketD, or the barplate E, as shown in Figs. 1 and 5. The plate is designed to be firmly attached to the rear face of the interior .corners of the frames or to the horizontal bars, as preferred, by means of screws through the holes ff, the opening or free end 01 of the projection Oextending in the direction of. the groove in which it is intended to slide, or upward in the plates at tached to the top bar (see Figs. 1 and 2) and downward in the plates attached to the bottom bar. (See Figs. 4 and 5.)

To render the fastenings of the plates more firm and the plates more easy to adjust in place, I prefer to project lugs y g from their inn er faces,which are designed to press against the interior faces of the bars to which the plates are fastened. Thus constructed, the set of projections attached to each bar are adapted to slide in the groove of the adjacent bar, so that when the two frames are thus com bined for the purposes for which they are made they cannot be separated laterally, except by splitting of the entire thickness of the wood between the groove and the projections-a result impossible to occur without the destruction of the frame, inasmuch as the groove is cut in the center or nearer. the exterior face of the bar. At the same time the limited width of the projections and character of the ma terial of which they are constructed occasions much less friction in the sliding of the frames than if they extended the entire length of the bar and were composed of wood,which What I claim, and desire to secure by Letters Patent, is

1. The combination of the an extensible screen with acorner-pla-te which is secured to one side of one of the frames at its corner, and which is provided with an angular projection, O, which extends over a too frames A B of IO ing bar of the other screen-frame, for the purportion of the other frame and catches in a pose of combining the frames together and groove, a, substantially as shown. i enabling them to easily slide upon each other,

2. The projection 0, having its shoulder 12 substantially as described.

firmly attached to or east upon a metallic eor- In besLiniony whereof I nflix my signature ner-brace or to a bar-plate, which is so fast in presence of two witnesses.

ened to E116 inner face of one of the horizontal A PTEi. or sliding bars 0i one sereen-irmne that Ms RD N PO 1 free end d may enter and freely move in a Vitnesses:

groove in the interior face of the correspond- CHARLES E. ALLEN,

WILL J. MURPHY. 

